International audience Transformations of international security need to understand them by innovative tools. The establishment of the european public prosecutor’s office, specialised in fighting crimes against the EU budget gives a new dimension to the intern aspect but also extern of the AFSJ. This supranational penal organism is the response to cross-border criminality affecting Union’s financial interests. With a scope of action beyond the Union’s territory, the prosecutor can make relationships with third countries with several tools. However, some limits can be noticed, potentially affecting his efficacity.